Electric bell.



N0. 686,526. Patented Nov. l2, l90l. J. J. MOSSOP.

ELECTRIC BELL.

A ucmn filed Feb. 20, 1901.

(No Model.)

THE NORRIS prrzns co.. PHuTou'rl-m, wuumcmnu. 11c,

UNITED STATES PATENT OFFICE.

JOHN J. MOSSOP, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC BELL.

SPECIFICATION forming part of Letters Patent No. 686,526, dated November 12, 1901. Application filed February 20, 1901. Serial No. 48,097. (No model.)

To all whom/ it may concern:

Be it known that I, JOHN JOSEPH Mossor, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Electric Bells, of which the following is a specification.

My invention has relation to an electric bell; and in such connection it relates to the construction and arrangement of the parts constituting such a bell.

The principal objects of my invention are, first, to simplify the construction and arrangement of the parts of an electric bell so as to enable the striking parts to be readily inserted in the hollow of the bell, and, second, to mount the hammer of the bell directly upon the armature and to cause said hammer to reciprocate through the post supporting the bell.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, in which- Figure 1 is a front elevational view of an electric bell embodying main features of my invention. Fig. 2 is a view similar to-Fig. 1, but with the bell removed to illustrate the striking parts. Fig. 3 is a vertical central sectional view of the electric bell. Fig. 4 is a horizontal sectional view on the line t 4 of Fig. 2, and Fig. 5 is an enlarged detail view of the adjustable striking end of the hammer.

Referring to the drawings, a represents the frame or plate supporting the actuating mechanism for the hell 1?. This bell b is removably secured by a screw 1) or other means to a centrally-arranged post b projecting from the frame a. On either side of the post 6 is arranged an electromagnet d or d, and these magnets d and d are supported by the frame a, as clearly illustrated in Figs. 2 and 3. The armature e for the magnets d and d is secured to one end of a reciprocating shaft f, squared, as at f, and traversing the post 17 in which it is guided and by means of which its reciprocatory motion in response to the armature e is rendered positive in one plane. A spring f coiled about the squared portion f of the shaft f and interposed between the armature e and the post 6 serves normally to elevate the armature e away from the magnets cl and d. Upon the armature e is formed a spring contact-piece g, preferably bowshaped and havinga slot or recess 9 at one end, so as to permit of some play back and forth in one of the pins g securing the spring 9 to the armature 6. Upon the top a, of the frame a, adjacent to the spring-contact g, is formed a contact-point g and upon this top frame a are preferably located the two binding-posts m and m. The post we is connected by the wire 19 with one magnet 17., and the other binding-post m is connected by the wire 10 with the contact-point 9 The two magnets d and d are connected by a wire p and the magnet dis connected by a wire 19 with the frame a and bell-post b The circuit may be traced as follows: When the armature e and its spring-contact g are pressed upward by the spring f the contact g and point g abut to complete the circuit. The current then passes from wire Z of the main circuit by the wire 19 from the bindingpost no to and through the magnets d and d. It then passes from magnet d by wire 19 to frame a, post b", and reciprocating shaft f, and thence by armature e and spring-contact g to the contact-point g? and wire 19 to the binding-post m and thence to return-wire 2 of the main circuit. The passage of the current through the magnets d and d energizes the same sufliciently to retract the armature e and spring-contact g and to thereby break the circuit. When so br0ken,the spiral spring f on the shaft f again presses the armature e and contact g upward to make the contact with the point 9 and complete the circuit. The movement of the armature e causes the shaft f to reciprocate in the bell-post b and causes its striking-point f to either strike the bell b or recede therefrom. The point f is in screw-threaded connection with the shaft f and may therefore be adjusted nicely on the shaft f, so that as this shaft reciprocates the point f will at alternate movements of said shaft strike the bell with sufficient force to cause it to ring. The frame a, electromagnets d and d, and the striking mechanism are so arranged that when the bell b is secured to the post b all the parts are covered by the bell, and the hammer-shaft f and its point f reciprocate within and strike upon the interior surface of the bell.

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Patent, is-

1'. In an electric bell, two electromagnets arranged side by side, a reciprocatory hammer-shaft arranged between said electromagnets, an armature for said magnets carrying said reciprocatory hammer, a spring normally adapted to elevate the armature away from the magnets, and a contact-piece formed upon and carried by said armature, said contact-piece adapted when the armature is elevated by the spring to make the circuit through the magnets and when the armature is attracted by said magnets to break the cir cnit through said magnets, substantially as and for the purposes described.

2. In an electric bell, in combination with two electromagnetaan armature therefor and a gong within the interior of which the mag nets and armature are arranged, of a post supporting said gong and arranged between the magnets, and a reciprocatory hammer-shaft traversing said post and guided therein between said magnets, said hammer-shaft being connected directly to said armature, substantially as and for the purposes described.

3. In an electric bell, in combination with two electromagnets, a gong, a hammer-shaft for said gong, said shaft arranged to reciprocate between the magnets, of an armature to one side of which the hammer-shaft is directly connected, and a circuit making and breaking spring-contact connected to the other side of said armature, substantially as and for the purposes described.

In testimony whereof I have hereunto set my signature in the presence of two subscribing witnesses.

JOHN J. MOSSOP.

Witnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH. 

